An Overview of Sea-Ice Conditions in the Greenland Sea and the Relationship of Oceanic Sedimentation to the Ice Regime

Ramseier, R. O.; Garrity, C.; Martin, Thomas

doi:10.1007/978-3-642-56876-3_2

Cited by 20 publications

(22 citation statements)

References 30 publications

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“…Its proximal part is *2 km wide, and the channel floor is *100 m deeper than the surroundings (Krause and Schauer 2000). In summer, the area is located in the vicinity of the MIZ (Vinje 1977;Ramseier et al 2001).…”

Section: Study Area and Seafloor Photographymentioning

confidence: 99%

Colonisation of hard substrata along a channel system in the deep Greenland Sea

Schulz

Bergmann

Juterzenka³

et al. 2010

Polar Biol

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The colonisation of hard substrata (HS) by epibenthic megafauna was studied by photographic surveys along the Ardencaple Canyon in the deep western Greenland Sea in 2000. Seven transects at 2,700-3,200 m water depth showed generally low densities of dropstones, sunken wood, and other substrata including anthropogenic material (range: 2-11 HS km -1 ). Overall, 30 different taxa and morphotypes were found on or associated with HS. While the sea anemone Bathyphellia margaritacea and the pantopod Ascorhynchus abyssi dominated the fauna on the substrate surfaces, a ball-shaped morphotype of uncertain taxonomic origin characterised assemblages marginally associated with HS. Community analysis revealed differences in faunal patterns near the continental rise and towards the deep sea, but diversity and evenness did not differ significantly between the various regions. However, we conclude that dropstones and other hard substrata at the seafloor serve as colonisation islands and thereby generally increase small-scale habitat diversity in polar deep-sea environments.

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Section: Study Area and Seafloor Photographymentioning

confidence: 99%

Colonisation of hard substrata along a channel system in the deep Greenland Sea

Schulz

Bergmann

Juterzenka³

et al. 2010

Polar Biol

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“…The ice in the Fram Strait originates from the eastern (Siberian) and central Arctic (Beaufort Sea) and is composed of first-year and old ice in equal proportions (Thomas et al 1996). The oceanic area between Svalbard and Greenland (northern Barents Sea and Greenland Sea) is often referred to as the shear zone between polar and Atlantic regimes (Peinert et al 2001b) in regard to the origin of water masses (Schäfer et al 2001) and the distribution of sea ice (Wadhams 2000, Ramseier et al 2001. This shear zone is generally considered as the major sink of ice-bound biomass (Peinert et al 2001a, Ramseier et al 2001).…”

Section: Abstract: Arctic Ice Fauna · Sympagic Amphipods · Fram Stramentioning

confidence: 99%

“…The oceanic area between Svalbard and Greenland (northern Barents Sea and Greenland Sea) is often referred to as the shear zone between polar and Atlantic regimes (Peinert et al 2001b) in regard to the origin of water masses (Schäfer et al 2001) and the distribution of sea ice (Wadhams 2000, Ramseier et al 2001. This shear zone is generally considered as the major sink of ice-bound biomass (Peinert et al 2001a, Ramseier et al 2001). On its passage towards Fram Strait, sea ice encounters a strong salinity and temperature gradient, and consequently continuous melting takes place along the ice edge.…”

Section: Abstract: Arctic Ice Fauna · Sympagic Amphipods · Fram Stramentioning

confidence: 99%

“…On its passage towards Fram Strait, sea ice encounters a strong salinity and temperature gradient, and consequently continuous melting takes place along the ice edge. In addition to the typical 'bottom melt' during winter, sea ice is subjected to considerable 'surface melt' due to elevated air temperatures in the summer period (Ramseier et al 2001). A broad belt along the ice margin is further subjected to hydrodynamic forces on different scales, such as swell, breakup, eddies and meanders (e.g.…”

Section: Abstract: Arctic Ice Fauna · Sympagic Amphipods · Fram Stramentioning

confidence: 99%

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Origin and fate of ice fauna in the Fram Strait and Svalbard area

Pavlova¹

2005

Mar. Ecol. Prog. Ser.

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“…Despite low annual primary production (1 -15 g C m À 2 year À 1 ; English, 1961;Wheeler et al, 1996;Gosselin et al, 1997) for the ice-covered central parts of the Arctic Ocean, increased seasonal phytoplankton and zooplankton productivity at the Marginal Ice Zone (MIZ) and within the Arctic shelf-seas has been reported. Ramseier et al (1999Ramseier et al ( , 2001) proposed a high productivity strip close to the mean annual MIZ, termed the BMIZ (Biological Marginal Ice Zone). Maximum concentrations of nutrients, chlorophyll a, high production of phytoplankton in surface waters, as well as maximum fluxes of POC and opal were obtained from sediment traps at various depths (Andreassen et al, 1996;Ramseier et al, 1999;Hebbeln, 2000;Owrid et al, 2000), in conjunction with high vertical export and accumulation rates of organic carbon to the surface sediments (Andreassen et al, 1996;Birgel and Stein, 2003).…”

Section: Introductionmentioning

confidence: 99%

Aliphatic lipids in recent sediments of the Fram Strait/Yermak Plateau (Arctic Ocean): composition, sources and transport processes

2004

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Surface sediments (n = 39) from the western Fram Strait and across the Yermak Plateau (Arctic Ocean) were investigated by molecular and isotopic organic geochemical methods to determine the composition, distribution and origin of extractable aliphatic lipids (n-alkanes, n-alkanols, fatty acids). Bulk geochemical parameters (TOC-content, d 13 C org ) were also determined, including additional samples nearby. Enhanced organic carbon contents of up to 1.6% along the western slope of the Yermak Plateau and north off Spitsbergen, corroborated by an average d 13 C org value of À 22.3x, indicated most of the organic material to be of a marine origin, despite ice-cover. The extractable aliphatic lipids contributed up to 1% of the sedimentary organic carbon and were dominated by fatty acids (0.7 -9.1 mg/g TOC), whereas n-alkanes and n-alkanols contributed only minor amounts (0.1 -0.4 mg/g TOC). The detailed molecular and carbon isotopic characterisation of the studied aliphatic compounds enabled assignments of most components to three lipid pools, representing: (a) primary production (marine phytoplankton, seaice algae), (b) secondary inputs (by feeding of zooplankton, benthic organisms and bacteria on the former) and (c) terrestrialderived contributions. The first two compound groups dominated, but varied significantly in relation to the environment and were highest at the MIZ (Marginal Ice Zone), and along the permanently ice-covered western flank of the Yermak Plateau. In contrast, compounds attributable to a terrestrial source were of only minor importance in terms of absolute concentrations and less variable, but showed increasing relative proportions from an average of 8 -14% at and southwards of the MIZ up to 27 -33% on the Yermak Plateau and towards the central Arctic Ocean as a consequence of the weakening signal of primary and secondary production. This study provides further insights into the Arctic Ocean carbon dynamics, but also an example of the impact of ocean-currents on the deposition and composition of organic matter. D

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An Overview of Sea-Ice Conditions in the Greenland Sea and the Relationship of Oceanic Sedimentation to the Ice Regime

Cited by 20 publications

References 30 publications

Colonisation of hard substrata along a channel system in the deep Greenland Sea

Colonisation of hard substrata along a channel system in the deep Greenland Sea

Origin and fate of ice fauna in the Fram Strait and Svalbard area

Aliphatic lipids in recent sediments of the Fram Strait/Yermak Plateau (Arctic Ocean): composition, sources and transport processes

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